Seat and back rest for a chair



FIG. 1 is a perspective view showing the top, left side and front of a seat and back rest for a chair which forms my new design, the broken lines of other parts of the chair in this and other figures being for illustrative purposes only and forming no part of my design;

FIG. 2 is an enlarged left side elevational view thereof;

FIG. 3 is an enlarged right side elevational view thereof;

FIG. 4 is an enlarged rear elevational view thereof;

FIG. 5 is an enlarged top plan view thereof; and,

FIG. 6 is an enlarged front elevational view.

The short, broken lines on the chair in FIGS. 1-6 are understood to represent stitching. 

The ornamental design for a seat and back rest for a chair, as shown and described. 